This passage describes how Jesus was filled with a righteous anger for how the church had changed, and how sin had consumed to temple. It talks about how Jesus is the new temple, and one the cannot be destroyed, no matter what.
As Christians, we believe we are the recipients of incredible, undeserved generosity from God. He hasn't treated us as our sins deserve - but has poured out his mercy and kindness to us - and continues to do so every day!
One of the ways we respond to God's generosity is to give our money cheerfully and sacrificially to honour God, and make Him known.